662845997 has 16 divisors (see below), whose sum is σ = 766495872. Its totient is φ = 566507520.

The previous prime is 662845969. The next prime is 662846003. The reversal of 662845997 is 799548266.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 662845997 - 2⁶ = 662845933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662845297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254333 + ... + 256925.

It is an arithmetic number, because the mean of its divisors is an integer number (47905992).

Almost surely, 2^662845997 is an apocalyptic number.

It is an amenable number.

662845997 is a deficient number, since it is larger than the sum of its proper divisors (103649875).

662845997 is a wasteful number, since it uses less digits than its factorization.

662845997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3988.

The product of its digits is 6531840, while the sum is 56.

The square root of 662845997 is about 25745.7957150289. The cubic root of 662845997 is about 871.9084353292.

It can be divided in two parts, 6628 and 45997, that added together give a palindrome (52625).

The spelling of 662845997 in words is "six hundred sixty-two million, eight hundred forty-five thousand, nine hundred ninety-seven".